Hi Thorsten I had the same issue after installing jbossws-metro-3.0.3 into jboss-4.2.3.GA. I then copied jbossws-client.jar from the client directory of the original jboss-4.2.3.GA distribution, and placed it into the server/default/lib directory (after applying jbossws-metro-3.0.3). Then the SAAJMetaFactoryImpl ClassNotFoundException went away. It seems that the metro installation will remove jbossws-client.jar. But I actually haven't done much testing yet and I don't have a good feeling about all of this. Silvano View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4180222#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...